adultescent

[ ad-uhl-tes-uh nt, uh-duhl‐ ]
/ ˌæd ʌlˈtɛs ənt, əˌdʌl‐ /

noun

a young adult or middle-aged person who has interests, traits, etc., that are usually associated with teenagers.

Origin of adultescent

First recorded in 1995–2000; adult + (adol)escent
Also called a·dul·to·les·cent [uh-duhl-tuh-les-uh nt] /əˌdʌl təˈlɛs ənt/, kidult.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

British Dictionary definitions for adultescent

adultescent

/ (ˌædəlˈtɛsənt) informal /

noun

an adult who is still actively interested in youth culture

adjective

aimed at or suitable for adultescents
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012